Same happened to me a few year ago, I was given permission from our local junior school to shoot the rabbits with airgun . not 10 minutes into action I had a copper chopper hovering overhead ready to land on the fecking field. so ups I get and walks over to the caretakers bungalow only to be stopped by two armed police and a very embarrassed caretaker...who said "sorry pal I forgot to let them know"... ..a resident had phoned them saying shed seen a masked man with a big gun !